Blood pressure is the pressure value of blood in the arteries. Measuring blood pressure at home helps monitor blood pressure. The sphygmomanometer records two values in mmHg:

Systolic Pressure

Represents the highest value of blood pressure when the heart is contracted.

Diastolic Pressure

Represents the lowest value of blood pressure when the heart is diastolic.
For example, the systolic pressure measured is 120 mm Hg, dialysis is 84 mm Hg, and the blood pressure monitor shows 120/84. Normal blood pressure, systolic blood pressure should be less than 120, diatolic pressure should be less than 80.

Types of sphygmomanometers

Electronic sphygmomanometer

Automatic Blood Pressure Monitors, a battery-operated blood pressure measuring instrument that uses microphones to detect the pulse. Use the pressure belt (armband) on the upper arm to tighten it, temporarily limit the blood flow of the arteries. When the pressure belt is relaxed and the blood begins to flow again, the sphygmomanometer automatically puts the pressure on the blood flow, then records it down. Sphygmomanometers that measure only fingers and wrist are often inaccurate and therefore are not recommended.

Manual sphygmomanometer

A manual sphygmomanometer for home use is similar to that used by a physician in a hospital. It usually contains armbands that need to be inflated manually, stethoscope or microphone, and blood pressure gauges. Use it by manually inflating the armband, deflating it, and listening to the pulse with the stethoscope. Blood pressure is displayed on the disc with a pointer. When the arm is inflated and pressure increases, the hand moves clockwise; if the arm is deflated and pressure decreases, it moves counterclockwise. Systolic pressure is the number that the hand refers to the moment the pulse is first heard after the arm is deflated, and diastolic pressure is the moment the hand disappears.

Portable blood pressure monitoring

The portable blood pressure monitor is a small instrument that can be worn all day long. The time of wearing is usually 24 to 48 hours, the blood pressure monitor will always automatically measure the blood pressure. If the results of other blood pressure measurements are different previously, the doctor may recommend this at home.

Why is it necessary to measure blood pressure at home?

Your doctor may advise you to measure your blood pressure at home if:

Pre-stage hypertension has been diagnosed: the maximum systolic pressure/blood pressure value is between 120 and 139 mm Hg, or the lowest diating/blood pressure value is between 80 and 89 mm Hg.

High blood pressure has been diagnosed: the maximum systolic pressure/blood pressure value is above 140 mm Hg, or the minimum diatur/blood pressure value is above 90 mm Hg.

The risk factors for Hypertension

Before measuring blood pressure at home, be sure to take note of these:
Unless instructed by your doctor, do not adjust your blood pressure on the basis of your measured blood pressure at home.
Blood pressure may vary from day to day, sometimes with the way the subject moves.
Usually blood pressure is higher in the morning and lower in the evening.
Stress, smoking, eating, exercise, colds, pain, noise, drugs and even speech can affect blood pressure.
High blood pressure measured at a time does not mean hypertension . Similarly, only one normal measurement does not mean that there is no hypertension. So measuring several times a day and getting an average value is more accurate than a one-sided amount.

Blood pressure may be normal at home, and might only be high when going to the hospital. This phenomenon is called White-Coat/Office Hypertension. It may be the result of stress from seeing a doctor. In this case, your doctor may recommend that you use portable blood pressure monitoring.

The process of measuring blood pressure at home

Before measuring blood pressure, do the following:

Ensuring comfort and relaxation
Go to the toilet in advance.
Be in a quiet place, to properly hear the pulse.
Roll up the sleeves of the arm or remove overly tight sleeves.
On a chair with a table next to it, sit on both feet and rest for 5 to 10 minutes. The upper arm is slightly bent, standing on the table with the heart height, palm facing up, arm should stand with, upper body upright, back against the back of the chair, legs should not cross.

When starting to measure blood pressure, note the following:

Try not to move or speak when measuring blood pressure
The lower part of the arm should be at least 2.5 cm away from the elbow.
The blood pressure from both hands can be one higher and one lower, so use the same arm for each measurement.

When you start to measure your blood pressure at home, you can measure it 3 times in a row, each interval of 5 to 10 minutes. Wait until you get started, 1 to 2 times per time.

Record the date, time, and blood pressure values after the blood pressure is measured. Daily activities, such as taking medication, mood, stress, also need to be recorded, as it also affects blood pressure and helps your doctor to better adjust your medication.

The results of blood pressure at home

The blood pressure of adults (over 18 years old) is interpreted as follows, in millimetric Hg.


systolic pressure 91~119, distolic pressure 61~79.


systolic blood pressure 120~139, diatolic pressure 80~89.


systolic blood pressure 140 or more, diatolic pressure 90 or more.


systolic pressure below 90, diatolic pressure below 60.
Definitions of normal values may vary depending on laboratories and hospitals, so consult a physician if you have any concerns.

Read: 4 Types of Breast Surgery